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Abstract
In this paper, an 18 GHz voltage-controlled oscillator (VCO) with improved phase noise (PN) and smaller size is proposed. The filter consists of an open stub resonator and an integrated spiral Defective Ground Structure (DGS) resonator. The proposed oscillator is designed in the 0.13-µm SiGe BiCMOS technology. The differential cross-coupled VCO uses a bandpass filter. In this work, the conventional large-size coil is replaced by a resonator based on our proposed open stub resonator and defected ground structure (DGS) where the filter is equivalent to the large coil and the associated capacitors. The use of the filter results in a great reduction of VCO size, low losses, and low power consumption, hence an enhancement in the quality factor. The integrated spiral DGS is etched on the third metal layer (M3) below an open stub meander line onthe top metal layer (TM2) of the 0.13-µm top metal two (TM2) BiCMOS technology. The proposed VCO has a small die area of 0.089 mm2 and has FoMA of 188.8 dB and a power consumption is 13.38 mw. The simulated carrier frequency and phase noise are 18-GHz and −123.59 dBc/Hz (−103.7 dBc/Hz) at 10-MHz (1 MHz) offset frequency, respectively, which results in a figure of merit of 177.37 dB.
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No potential conflict of interest was reported by the author(s).
Additional information
Notes on contributors
Marwa E. Mousa
Marwa Ebrahim Mousa received her M.Sc degree from the Department of Electronics and Communications Engineering, Mansoura University, Egypt in 2019. And the B.Sc. degree in Electronics and Communications engineering from the Higher Institute of Engineering and Technology in New Damietta-Egypt by 2012. She worked as an assistant teacher at new Damietta Higher Institute of Engineering and Technology - Egypt. She is registered for a Ph.D. degree at Electronics and Communications Engineering, Mansoura University, Egypt in 2021.
Mohamed A. Yakout
Dr. Mohamed Abdel-Alim Yakout was born in Cairo, Egypt. He currently works as an associate Professor in the Electronics and Electrical Communications Engineering Department, Faculty of Engineering, Mansoura University (MU), Mansoura, Egypt. He received his B.Sc. with honors and M.Sc. degrees from MU in 1986 and 1992, respectively. He received his Ph.D. degree from Mansoura University, Mansoura, Egypt in 1997. During the period of 1993-1996 he was a visiting scolar at Technical University of Nova Scotia (TUNS), Nova Scotia, Canada where part of his Ph.D. thesis has been done. He won the MU best Ph.D thesis award for the year 1997/1998. He worked as an assistan Professor in Electronics dept.,College of Technological Studies (CTS), PAAET, Kuwait since 2001. His research interests include VLSI, Current-mode Circuits, ANN, RF circuits and Nano-electronics.
Haythem H. Abdullah
Haythem Hussein Abdullah received a BSc. degree in Electronics and communication engineering from the University of Benha, Egypt in 1998 and received his M.Sc. and Ph.D. degrees from Cairo University in 2003 and 2010, respectively. His M.Sc. is dedicated to the simulation of the dispersive materials in the Finite Difference Time Domain numerical technique and its application to the SAR calculations within the human head. The Ph.D. is dedicated to radar target identification. His current research interests are the design and optimization of microstrip antenna arrays and their applications. He is now employed as an Prof, head of microwave engineering Lab, and a former head of the nanotechnology lab. at the Electronics Research Institute (ERI), Cairo, Egypt. His current research interests are the design and optimization of microstrip antenna arrays and their applications. He was the PI of several projects funded by different funding national and international agencies.
M. El din Abo El-Soud
Mohy Eldin A. Aboelsoud received the M.Sc. degree in Electronics and Communication Engineering Department from Cairo University, Cairo, Egypt, in 1979, and the Ph.D degree from L'Institut National Polytechnique de Toulouze, Toulouze, France, in 1983. He has worked for Technical Research Center (TRC) from 1970 to 1990. During 1984 - 1990,he was a chairman with Electronics Department at TRC. From 1991 to 1996, he was an associated professor at Mansoura University. He is currently full professor with ECE Department of Mansoura University since 1996.He has authored and co-authored more than130 in international journals and conferences. His research interests, analog/digital VLSI and FPGA circuit design,Sigma/Delta A/D techniques,switched-resistor networks,electronic systems and its applications of neural networks.